Check the picture below.
make sure your calculator is in Degree mode.
Complementary Angles is a pair of any two acute angles that add up to make 90 degrees
90-80 = 10
the angle is 10 degrees
C is the correct answer
C. 4x + y = 21
4(3) + 9 = 21
12 + 9 = 21
21 = 21
Answer: 360g
120 --> 10
x ---> 30
120*30=10*x
3600= 10*x
x= 3600/10
x= 360
Matthew needs 360g of flour
4x + 5y = 9
5y = -4x + 9
y = -4/5x + 9/5......slope intercept form (y = mx + b)
In y = mx + b form, which is what this equation is in now, the slope is in the m position and the y int is in the b position
y = mx + b
y = -4/5x + 9/5
so ur slope(m) = -4/5 and ur y int (b) = 9/5
